| Parameter |
Value |
| Designation |
234P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-12-22T16:26:47.500800Z |
| Orbit solution date (soln_date, UTC) |
2025-07-07T14:12:30Z |
| Obs used |
377 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
22.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-04-28.0000000 |
| e |
0.25077789 |
| q (au) |
2.858038 |
| a (au) |
3.814674 |
| i (deg) |
11.516795 |
| Ω (om, deg) |
179.719928 |
| ω (w, deg) |
358.128979 |
| M (ma, deg) |
113.411811 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.435 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.435 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.675 |
| k |
0.800 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
18:57:12.29 |
-11:24:47.3 |
HIP 92993 |
7.65 |
| 2026-09-20 12:00 |
18:57:19.33 |
-11:26:19.5 |
HIP 92993 |
9.27 |
| 2026-09-21 00:00 |
18:57:26.59 |
-11:27:51.1 |
HIP 93103 |
8.85 |
| 2026-09-21 12:00 |
18:57:34.09 |
-11:29:22.1 |
HIP 93103 |
6.73 |
| 2026-09-22 00:00 |
18:57:41.82 |
-11:30:52.5 |
HIP 93103 |
4.81 |
| 2026-09-22 12:00 |
18:57:49.78 |
-11:32:22.3 |
HIP 93103 |
3.51 |
| 2026-09-23 00:00 |
18:57:57.97 |
-11:33:51.6 |
HIP 93103 |
3.67 |
| 2026-09-23 12:00 |
18:58:06.39 |
-11:35:20.2 |
HIP 93103 |
5.21 |
| 2026-09-24 00:00 |
18:58:15.03 |
-11:36:48.2 |
HIP 93103 |
7.34 |
| 2026-09-24 12:00 |
18:58:23.90 |
-11:38:15.6 |
HIP 93103 |
9.71 |
| 2026-09-25 00:00 |
18:58:33.00 |
-11:39:42.4 |
HIP 93103 |
12.21 |
| 2026-09-25 12:00 |
18:58:42.32 |
-11:41:08.5 |
HIP 93103 |
14.79 |
| 2026-09-26 00:00 |
18:58:51.86 |
-11:42:34.1 |
HIP 93103 |
17.44 |
| 2026-09-26 12:00 |
18:59:01.63 |
-11:43:58.9 |
HIP 93103 |
20.15 |
| 2026-09-27 00:00 |
18:59:11.61 |
-11:45:23.2 |
HIP 93103 |
22.90 |
| 2026-09-27 12:00 |
18:59:21.81 |
-11:46:46.8 |
HIP 93103 |
25.71 |
| 2026-09-28 00:00 |
18:59:32.24 |
-11:48:09.7 |
HIP 93103 |
28.56 |
| 2026-09-28 12:00 |
18:59:42.88 |
-11:49:32.0 |
HIP 93103 |
31.45 |
| 2026-09-29 00:00 |
18:59:53.73 |
-11:50:53.7 |
HIP 93103 |
34.39 |
| 2026-09-29 12:00 |
19:00:04.80 |
-11:52:14.7 |
HIP 93103 |
37.37 |
| 2026-09-30 00:00 |
19:00:16.09 |
-11:53:35.0 |
HIP 93103 |
40.39 |
| 2026-09-30 12:00 |
19:00:27.59 |
-11:54:54.6 |
HIP 93103 |
43.46 |
| 2026-10-01 00:00 |
19:00:39.30 |
-11:56:13.6 |
HIP 93200 |
45.80 |
| 2026-10-01 12:00 |
19:00:51.22 |
-11:57:31.9 |
HIP 93200 |
46.31 |
| 2026-10-02 00:00 |
19:01:03.36 |
-11:58:49.5 |
HIP 93200 |
47.08 |
| 2026-10-02 12:00 |
19:01:15.70 |
-12:00:06.4 |
HIP 93200 |
48.10 |
| 2026-10-03 00:00 |
19:01:28.25 |
-12:01:22.6 |
HIP 93200 |
49.36 |
| 2026-10-03 12:00 |
19:01:41.02 |
-12:02:38.1 |
HIP 93560 |
46.95 |
| 2026-10-04 00:00 |
19:01:53.98 |
-12:03:53.0 |
HIP 93560 |
44.27 |
| 2026-10-04 12:00 |
19:02:07.16 |
-12:05:07.1 |
HIP 93560 |
41.69 |
| 2026-10-05 00:00 |
19:02:20.53 |
-12:06:20.5 |
HIP 93560 |
39.23 |
| 2026-10-05 12:00 |
19:02:34.12 |
-12:07:33.2 |
HIP 93560 |
36.93 |
| 2026-10-06 00:00 |
19:02:47.90 |
-12:08:45.1 |
HIP 93560 |
34.84 |
| 2026-10-06 12:00 |
19:03:01.89 |
-12:09:56.4 |
HIP 93560 |
33.00 |
| 2026-10-07 00:00 |
19:03:16.08 |
-12:11:06.9 |
HIP 93560 |
31.49 |
| 2026-10-07 12:00 |
19:03:30.47 |
-12:12:16.6 |
HIP 93560 |
30.36 |
| 2026-10-08 00:00 |
19:03:45.05 |
-12:13:25.6 |
HIP 93560 |
29.68 |
| 2026-10-08 12:00 |
19:03:59.84 |
-12:14:33.9 |
HIP 93560 |
29.48 |
| 2026-10-09 00:00 |
19:04:14.82 |
-12:15:41.4 |
HIP 93560 |
29.80 |
| 2026-10-09 12:00 |
19:04:30.00 |
-12:16:48.2 |
HIP 93560 |
30.63 |
| 2026-10-10 00:00 |
19:04:45.37 |
-12:17:54.2 |
HIP 93849 |
29.71 |
| 2026-10-10 12:00 |
19:05:00.94 |
-12:18:59.5 |
HIP 93849 |
25.77 |
| 2026-10-11 00:00 |
19:05:16.70 |
-12:20:04.0 |
HIP 93849 |
21.78 |